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| Mirrors > Home > ILE Home > Th. List > elfz2 | Unicode version | ||
| Description: Membership in a finite
set of sequential integers. We use the fact that
an operation's value is empty outside of its domain to show |
| Ref | Expression |
|---|---|
| elfz2 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | anass 405 |
. 2
| |
| 2 | df-3an 1011 |
. . 3
| |
| 3 | 2 | anbi1i 462 |
. 2
|
| 4 | df-fz 10423 |
. . . 4
| |
| 5 | 4 | elmpocl 6284 |
. . 3
|
| 6 | simpl 109 |
. . 3
| |
| 7 | elfz1 10427 |
. . . 4
| |
| 8 | 3anass 1013 |
. . . . 5
| |
| 9 | ibar 301 |
. . . . 5
| |
| 10 | 8, 9 | bitrid 192 |
. . . 4
|
| 11 | 7, 10 | bitrd 188 |
. . 3
|
| 12 | 5, 6, 11 | pm5.21nii 716 |
. 2
|
| 13 | 1, 3, 12 | 3bitr4ri 213 |
1
|
| Colors of variables: wff set class |
| This proof depends on syntax axioms:
|
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 623 ax-in2 624 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-sep 4249 ax-pow 4311 ax-pr 4346 ax-setind 4684 ax-cnex 8271 ax-resscn 8272 |
| This proof depends on definitions: df-bi 117 df-3or 1010 df-3an 1011 df-tru 1405 df-fal 1408 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ne 2421 df-ral 2533 df-rex 2534 df-rab 2537 df-v 2823 df-sbc 3052 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-pw 3690 df-sn 3715 df-pr 3716 df-op 3718 df-uni 3936 df-br 4131 df-opab 4193 df-id 4438 df-xp 4780 df-rel 4781 df-cnv 4782 df-co 4783 df-dm 4784 df-iota 5337 df-fun 5379 df-fv 5385 df-ov 6088 df-oprab 6089 df-mpo 6090 df-neg 8502 df-z 9650 df-fz 10423 |
| This theorem is used by: elfzd 10430 elfz4 10432 elfzuzb 10433 uzsubsubfz 10463 fzmmmeqm 10475 fzpreddisj 10489 elfz1b 10508 fzp1nel 10522 elfz0ubfz0 10543 elfz0fzfz0 10544 fz0fzelfz0 10545 fz0fzdiffz0 10548 elfzmlbp 10550 fzind2 10669 iseqf1olemqcl 10951 iseqf1olemnab 10953 iseqf1olemab 10954 seq3f1olemqsumkj 10963 seq3f1olemqsumk 10964 swrdswrdlem 11492 swrdswrd 11493 pfxccatin12lem2a 11515 pfxccatin12lem1 11516 swrdccatin2 11517 pfxccatin12lem2 11519 pfxccat3 11522 summodclem2a 12167 fsum3 12173 fsum3cvg3 12182 fsumcl2lem 12184 fsumadd 12192 fsummulc2 12234 prodmodclem3 12361 prodmodclem2a 12362 fprodntrivap 12370 fprodeq0 12403 isprm5 12940 ballotfilemonn 13273 bpos 16281 gausslemma2dlem3 16348 2lgslem1a1 16371 |
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